OASE Foam BioPlus 20ppi blue (Coarse)

The Filter Foam BioPlus 20 ppi for the BioPlus 50, 100, or 200 includes a coarse replacement filter foam. The combination of coarse and fine filter foams and fleeces allows you to customize to meet the filtration needs of your aquarium. Timing to replace the filter foam varies upon aquarium size, number of fish and plants, and declines in filter performance.